Xlib offers a series of functions which return specific events, like XIfEvent(), XMaskEvent(), XWindowEvent(), XCheckTypedEvent() (and their "Check" versions) ...
How about for XCB? Is there any way to get only specific events in the event queue?
xcb_wait_for_special_event() seems to be one of such functions, but there is no detailed manual, so I don't know how to use it.
I tried to read source codes of xlib and xcb, but it was beyond my capacity.
With libxcb, there is no "fancy event queue management". You'll have to call xcb_poll_for_event() in a loop yourself and put events in your own event queue. Then you can handle events in that queue in whatever order you want, prioritising some events, if you want.